what is the temperature of gas and volume of gas

D. A liquid with something dissolved in it

A solution is a liquid with something dissolved in it.

The correct answer is D. A solution is a homogeneous mixture composed of two or more substances. It consists of a solvent, which is the component present in the larger amount, and a solute, which is the component that is dissolved in the solvent. In a solution, the solute particles are dispersed uniformly throughout the solvent, resulting in a single phase.

Solutions can be formed with various combinations of solvents and solutes. Common examples include saltwater (where salt is dissolved in water), sugar dissolved in coffee, and carbon dioxide dissolved in soda. In these examples, the solvent is water, coffee, and soda, respectively, while the solutes are salt, sugar, and carbon dioxide.

The formation of a solution occurs when the solute particles interact with the solvent particles, forming intermolecular bonds or attractions. These interactions allow the solute particles to become dispersed and distributed evenly throughout the solvent. As a result, the solute particles are no longer visible, and the solution appears uniform and transparent.

Solutions play a crucial role in various aspects of everyday life and scientific processes. They are widely used in industries, laboratories, and households for purposes such as cleaning, manufacturing, chemical reactions, and medicine. The ability to dissolve substances in a solvent and create solutions is a fundamental concept in chemistry and has important implications in fields such as biology, pharmacology, and environmental science.

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Answer:

2) The volume of an underwater bubble increases as it rises and the pressure decreases

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Answer:

the molecular formula is CO2

The bond formed is covalent bond

CO2+H2O = H2CO3

The reaction between the compound and water will give us carbonic acid (H2CO3)

Answer:

Explanation:

its true

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Answer:

True

Explanation:

Answer:

20 liters of 50% solution and 80 liters of 25% solution

Explanation:

Let x litres be the amount of 50% solution to be used.

Since the amount of 25% solution used is 20 liters less than 5 times the amount of 50% solution used, then the 25% solution would be (5x -20) litres.

Therefore, 50x + 25(5x-20) = 30(x + 5x-20)

50x + 125x - 500 = 30x + 150x - 6 00

175x - 500 = 180x - 600

Collecting like terms

180x - 175x = 600 - 500

5x = 100

x = 20

Therefore, volume of 50% solution needed = 20 litres

Volume of 25% solution needed = (5 * 20) - 20 = 80 litres

20 liters of 50% solution and 80 liters of 25% solution

Answer:

[tex]L_{\text{fusion}[/tex] is latent heat of fusion.

Explanation:

[tex]Q=mL_{\text{fusion}}[/tex]

Here,

m is mass of substance

[tex]L_{\text{fusion}[/tex] is latent heat of fusion.

Answer:-1222kj

Explanation:

Based on the bond energies, the reaction HC≡CH(g) + 5/2 O₂(g) → 2 CO₂(g) + H₂O(g) has a standard enthalpy of reaction of -1222 kJ/mol.

Let's consider the following reaction.

HC≡CH(g) + 5/2 O₂(g) → 2 CO₂(g) + H₂O(g)

Given the bond energies (E), we can calculate the standard enthalpy of the reaction (ΔH°rxn) using the following expression.

[tex]\Delta H\° _{rxn} = E(broken\ bonds) - E(formed\ bonds)[/tex]

The broken bonds are:

 HC≡CH

  O₂

The formed bonds are:

  CO₂

  H₂O

[tex]\Delta H\°_{rxn} = E(C\equiv C) + 2 E(C-H) + 5/2 E(O=O) - 4 E(C=O) - 2 E(O-H)\\\\\Delta H\°_{rxn} = 835kJ/mol + 2 (411kJ/mol) + 5/2 (494kJ/mol) - 4 (799kJ/mol) - 2 (459kJ/mol) = -1222 kJ/mol[/tex]

Based on the bond energies, the reaction HC≡CH(g) + 5/2 O₂(g) → 2 CO₂(g) + H₂O(g) has a standard enthalpy of reaction of -1222 kJ/mol.

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Answer: Payback time = 0.0075

Explanation: Since payback time is calculated as:

payback time = [tex]\frac{installation cost}{annual savings}[/tex]

First determine the installation cost:

100 mm thick insulation covers 8.3 m². Then 300 mm covers 24.9 m².

To cover 8.3m² costs £20. Then, the cost to cover 24.9 m² is:

cost = [tex]\frac{20*24.9}{8.3}[/tex]

cost = £60

The cost of putting the insulation is £120, so the total cost is:

total cost = £60 + £120

total cost = £180

Savings per year per 100 mm thick is £80. For 300 mm, the value of annual savings is:

savings = [tex]\frac{300*80}{100}[/tex]

savings = 240

payback time = [tex]\frac{installation cost}{annual savings}[/tex]

payback time = [tex]\frac{180}{240}[/tex]

payback time = 0.75

Respuesta:

D) Iónico y metálico

Explicación:

Consideremos al elemento con la configuración electrónica 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s¹.

Como el electron diferencial está en el nivel 4, el elemento está en el Periodo 4.

Como hay 1 electrón en el último nivel, el elemento esta en el Grupo 1.

El elemento en esa posición es el Potasio, que es un metal, por lo que puede formar enlaces metálicos con metales y enlaces iónicos con no metales.

Answer:

"The strength of ionization decreases as the proportion including its protons to the excited electrons" is the right solution.

Explanation:

This question seems incomplete. I believe the answer choices are as followed:

O The ionization energy decreases because the ratio of the protons to electrons increases.

O The ionization energy increases because the ratio of the protons to electrons increases.

O The ionization energy decreases because the ratio of the protons to electrons decreases.

O The ionization energy increases because the ratio of the protons to electrons decreases.

The answer to this is The ionization energy increases because the ratio of the protons to electrons increases. (2nd option).

Answer:

Mass of the water = 0.1kg is 100g

Explanation:

Mathematically;

Quantity of heat = mass of water * specific heat capacity * temperature change

From the question, we identify the following;

Quantity of heat = 6.3 KJ

1 KJ = 1000 J, so 6.3 KJ = 6.3 * 1000 = 6300 J

Mass of water = ?

Specific heat capacity = 4200

Temperature change is the difference between the final and initial temperature. = 75-60 = 15

6300 = m * 15 * 4200

63 = m * 15 * 42

63 = 630 m

m = 63/630

m = 0.1 kg

increasing the temperature decreases the value of equilibrium constant for the forward reaction is endothermic

Answer:

Increasing the temperature decreases the value of the equilibrium constant. Where the forward reaction is endothermic, increasing the temperature increases the value of the equilibrium constant

Answer:

J. J. Thomson discovered electrons.

Explanation:

Thomson discovered electrons using the cathode ray tube experiment. When he observed the results of the experiment, he made his own atomic model. He created the Plum Pudding Model, which states that electrons are spread out among the atom with the protons (modern day, this is incorrect).

Answer:

Heating Fan is 75.33% efficient.

Explanation:

As it is mentioned that the given fan is a HEATING FAN, it means the it is used for provided heat (thermal energy) to the surrounding. Hence, its efficiency depends upon how much heat/thermal energy is provides.

We can state that.

Total Energy provided = 150 J

Useful Energy = 113 J

Wasted Energy = 37 J

The efficiency of the heating fan can be given by following formula:

Efficiency = ( Useful Energy / Total Energy ) × 100

Efficiency = ( 113 J / 150 J) × 100

Efficiency = (0.7533)× 100

Efficiency = 75.33%

Answer:

The correct answer to the following question will be Option A (Microwaves).

Explanation:

The other given choices are not related to the given circumstances. So that option A seems to be the appropriate one.

Answer:

its a

Explanation:

Answer:

Addition

Explanation:edg 2020

Answer:

The correct answer is A.

Explanation:

Edge 2022

Answer:A

Explanation: Were there any living organisms is the answer because physics is the study of matter,its motion and behaviour of space and time and some other topics like energy and force.

Answer:

B

Explanation:

Forces and vectors on a probe are a physics thing

Answer:

Option A. 0

Explanation:

To know the number of lone pair on each H in NH3, we shall determine how NH3 is formed. This is illustrated below:

3H + N —> NH3

Three atoms of Hydrogen, H reacted with 1 atom of nitrogen to produce ammonia, NH3. Each atoms contribute one electron each to form the covalent bond in NH3.

Hydrogen has only one electron and it will share it with the nitrogen atom to produce ammonia.

Further details can be seen in the attached photo.

Further more, in the attached photo, we can see that there is no lone pair of electron in the hydrogen atom as all it's electron has been used to form bond with the nitrogen atom. Only the nitrogen has a lone pair of electron.

Therefore, there are zero lone pair of electron on each hydrogen, H atom in ammonia, NH3.

Answer:

Those people could sustain on Mars, by living closer to the poles

Explanation:

As it is given that caps involve the water ice instead of the carbon dioxide

And, current observations of spectrum analyzed that the polar caps are totally different from one other i.e northern one involves more water ice while on the other hand,  the southern one involves most of the carbon dioxide

Moreover, the astronomers unable to see to spectrum portions as the atmosphere absorbs the wavelength

So we conclude that the people could survive on mars if they live near to poles

Answer:

Water cycle

Explanation:

The water cycle, also called as the hydrologic cycle that describes the continual flow of water i.e on over and beyond the surface of the Earth.

The nutrient cycle refers to the cycle in which there is a movement and exchange of organic and inorganic matter

Therefore the water cycle is not a nutrient cycle and hence the same is to be considered

Answer:

water cycle

Explanation:

:)

Explanation:

density = mass/volume

density = 89.6/10

density = 8.96g/cm³

Answer:

[tex]\large \boxed{\text{104 kPa}}[/tex]

Explanation:

To solve this problem, we can use the Combined Gas Laws:

[tex]\dfrac{p_{1}V_{1} }{n_{1}T_{1}} = \dfrac{p_{2}V_{2} }{n_{2}T_{2}}[/tex]

Data:

p₁ = 748 kPa;  V₁ =   273 m³;  n₁ = n₁;  T₁ =  525 K

p₂ = ?;             V₂ = 1100. m³; n₂ =  n₁; T₂ =  293 K

Calculations:

[tex]\begin{array}{rcl}\dfrac{p_{1}V_{1}}{n_{1} T_{1}} & = & \dfrac{p_{2}V_{2}}{n_{2} T_{2}}\\\\\dfrac{\text{748 kPa}\times \text{273 m}^{3}}{n _{1}\times \text{525 K}} & = &\dfrac{p_{2}\times \text{1100. m}^{3}}{n _{1}\times \text{293 K}}\\\\\text{390.0 kPa} & = &3.754{p_{2}}\\p_{2} & = & \dfrac{\text{390.0 kPa}}{3.754}\\\\ & = & \textbf{104 kPa} \\\end{array}\\\text{The new pressure is $\large \boxed{\textbf{104 kPa}}$}[/tex]

Answer:

c

Explanation:

hydrogen Bond exist between ammoia, hydrogen fluoride and water so the answer is c

Answer:

False

Explanation:

Cell division is a primary procedure by all cells. This process in the life cycle of cells ensures that new cells (daughter cells) are produced. The two major process are; meiosis and mitosis.

Normal cells would divide if the nutrients required are not present, since water is the main nutrient required. But in some cases, the division process may lead to an effect on one or both daughter cells. This effect is called mutation, thereby mutated cells may be produced.

Answer:

The three main subatomic particles that form an atom are protons, neutrons, and electrons.

Explanation:

Answer:

The three main subatomic particles that form an atom are protons, neutrons, and electron

Answer:

Explanation:

Symmetry can help resolve many chemistry problems and usually the first step is to determine the symmetry. If we know how to determine the symmetry of small molecules, we can determine symmetry of other targets which we are interested in. Therefore, this module will introduce basic concepts of group theory and after reading this module, you will know how to determine the symmetries of small molecules.

Introduction

Symmetry is very important in chemistry researches and group theory is the tool that is used to determine symmetry. Usually, it is not only the symmetry of molecule but also the symmetries of some local atoms, molecular orbitals, rotations and vibrations of bonds, etc. that are important. For example, if the symmetries of molecular orbital wave functions are known, we can find out information about the binding. Also, by the selection rules that are associated with symmetries, we can explain whether the transition is forbidden or not and also we can predict and interpret the bands we can observe in Infrared or Raman spectrum.

Symmetry operations and symmetry elements are two basic and important concepts in group theory. When we perform an operation to a molecule, if we cannot tell any difference before and after we do the operation, we call this operation a symmetry operation. This means that the molecule seems unchanged before and after a symmetry operation. As Cotton defines it in his book, when we do a symmetry operation to a molecule, every points of the molecule will be in an equivalent position.

Symmetry Elements

For different molecules, there are different kinds of symmetry operations we can perform. To finish a symmetry operation, we may rotate a molecule on a line as an axis, reflect it on a mirror plane, or invert it through a point located in the center. These lines, planes, or points are called symmetry elements. There may be more then one symmetry operations associated with a particular symmetry

Identity E

The molecule does not move and all atoms of the molecule stay at the same place when we apply an identity operation, E, on it. All molecules have the identity operation. Identity operation can also be a combination of different operations when the molecule returns to its original position after these operations are performed.1 This will be demonstrated later.

Answer:

Neon and Methane

Explanation:

Nitrogen and Oxygen made up way over half of the atmosphere so it's without a doubt, not those two. Precisely, Nitrogen makes up 78% of the atmosphere while oxygen makes up 21%

Answer: neon and methane

Answer:

Explanation:The molecular formula of ammonia is NH3

Answer:

1) 5 kJ

2) 125 moles

3) 81.33 kJ

4) 135.9 grams

5) 15.165 kJ

6) 97.6 J

Explanation:

1) Molar mass of ice (water) = 18.015 g/mol

Number of moles, n, of ice = mass/(molar mass) = 15/18.015 = 0.833 moles

ΔHfus = 6.00 kJ/mol

Energy required, E = ΔHfus × n = 0.833 × 6 = 4.996 ≈ 5 kJ

2) Number of moles of ice that can be melted by E = 750 kJ is given by the equation;

n = E/(ΔHfus) = 750/6 = 125 moles

3) Given that ΔHvap = 40.7 kJ/mol, we have;

Number of moles of water, n = 36/18.015 = 1.998 ≈ 2 moles

Heat required = ΔHvap × n = 40.7 × 2 = 81.33kJ

4) Given that heat removed, ΔH= 307 kJ, we have;

n = ΔH/ΔHvap = 307/40.7 = 7.543 moles

Mass of water = Number of moles × Molar mass = 7.543 × 18.015 = 135.9 grams

5) Energy required, E for iodine to melt = Number of moles of iodine × ΔHfus of iodine

Number of moles of iodine = Mass of iodine/(Molar mass of iodine)

Number of moles of iodine = 248/126.9 = 1.954 moles

Energy required, E for iodine to melt = 1.954 × 7.76  = 15.165 kJ

6) Energy required, E for 4.24 g of lead to melt = Number of moles of lead × ΔHfus of lead

Number of moles of lead= Mass of lead/(Molar mass of lead)

Number of moles of iodine = 4.24/207.2 = 0.0205 moles

Energy required, E for iodine to melt = 0.0205 × 4.77 = 9.76 × 10⁻² kJ = 97.6 J.